if its certified theres a warranty invoke it re the transmission if youre seeing bad symptoms but if youre just referring to the general tranny issues with latemodel fiestas but have not seen anything specific in your car you are complaining prematurely not every fiesta is screwed up that way as for the horrible deal you signed yeah you shouldnt have signed it no a kindly dealer is not going to allow you to unwind the deal based on post hoc realization that you got hosed just dont make any more deals like this consider refinancing asap to go for shorter loan term bigger payments lower interest rate and get out from under the obligation more quickly try a credit union